Hey Ebbnflow, I have got a challenge for you: Try to solo the vault room in BRD. You need to kill Warder Stilgiss and his dog (mages can solo), open up all 12 vaults and then kill the 4 elite golems. Im not sure if this is possible, but you could thereotically help druids farm the prebis healing mace, which can drop from the secret safe.
How do you deal with actually killing the mystics, when its time for it? Are you just shit out of luck if one of the packs before the boss has a mystic in it?
Dude! Just get some rogues to your group and a feral tank. Promise they can roll gem for UBRS ring-key and stealth run to boss. You will get your maul and pants in less time than with this method.